mirror of
git://git.gnupg.org/gnupg.git
synced 2024-12-23 10:29:58 +01:00
d4e2302d8f
* dirmngr/domaininfo.c (insert_or_update): Copy the name. * dirmngr/misc.c (copy_stream): Allow arg OUT to be NULL. * dirmngr/server.c (set_error): Protect CTX. (dirmngr_status): Protect against missing ASSUAN_CTX. (dirmngr_status_help): Ditto. (dirmngr_status_printf): Ditto. (cmd_wkd_get): Factor code out to ... (proc_wkd_get): new func. Support silent operation with no CTX. (task_check_wkd_support): New. -- This finalizes the feature to efficiently cache WKD checks. If a standard WKD query returns no data, we queue a test to be run after the end of the session (so that we do not delay the calling client). This check tests whether the server responsible for the queried address has WKD at all enabled. The test is done by checking whether the "policy" file exists. We do not check the "submission-address" file because that is not necessary for the web key operation. The policy file is now required. Signed-off-by: Werner Koch <wk@gnupg.org>
411 lines
11 KiB
C
411 lines
11 KiB
C
/* ks-action.c - OpenPGP keyserver actions
|
|
* Copyright (C) 2011 Free Software Foundation, Inc.
|
|
* Copyright (C) 2011, 2014 Werner Koch
|
|
* Copyright (C) 2015 g10 Code GmbH
|
|
*
|
|
* This file is part of GnuPG.
|
|
*
|
|
* GnuPG is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* GnuPG is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, see <https://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <config.h>
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <assert.h>
|
|
|
|
#include "dirmngr.h"
|
|
#include "misc.h"
|
|
#include "ks-engine.h"
|
|
#include "ks-action.h"
|
|
#if USE_LDAP
|
|
# include "ldap-parse-uri.h"
|
|
#endif
|
|
|
|
/* Called by the engine's help functions to print the actual help. */
|
|
gpg_error_t
|
|
ks_print_help (ctrl_t ctrl, const char *text)
|
|
{
|
|
return dirmngr_status_help (ctrl, text);
|
|
}
|
|
|
|
|
|
/* Called by the engine's help functions to print the actual help. */
|
|
gpg_error_t
|
|
ks_printf_help (ctrl_t ctrl, const char *format, ...)
|
|
{
|
|
va_list arg_ptr;
|
|
gpg_error_t err;
|
|
char *buf;
|
|
|
|
va_start (arg_ptr, format);
|
|
buf = es_vbsprintf (format, arg_ptr);
|
|
err = buf? 0 : gpg_error_from_syserror ();
|
|
va_end (arg_ptr);
|
|
if (!err)
|
|
err = dirmngr_status_help (ctrl, buf);
|
|
es_free (buf);
|
|
return err;
|
|
}
|
|
|
|
|
|
/* Run the help command for the engine responsible for URI. */
|
|
gpg_error_t
|
|
ks_action_help (ctrl_t ctrl, const char *url)
|
|
{
|
|
gpg_error_t err;
|
|
parsed_uri_t parsed_uri; /* The broken down URI. */
|
|
|
|
if (!url || !*url)
|
|
{
|
|
ks_print_help (ctrl, "Known schemata:\n");
|
|
parsed_uri = NULL;
|
|
}
|
|
else
|
|
{
|
|
#if USE_LDAP
|
|
if (ldap_uri_p (url))
|
|
err = ldap_parse_uri (&parsed_uri, url);
|
|
else
|
|
#endif
|
|
{
|
|
err = http_parse_uri (&parsed_uri, url, 1);
|
|
}
|
|
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
/* Call all engines to give them a chance to print a help sting. */
|
|
err = ks_hkp_help (ctrl, parsed_uri);
|
|
if (!err)
|
|
err = ks_http_help (ctrl, parsed_uri);
|
|
if (!err)
|
|
err = ks_finger_help (ctrl, parsed_uri);
|
|
if (!err)
|
|
err = ks_kdns_help (ctrl, parsed_uri);
|
|
#if USE_LDAP
|
|
if (!err)
|
|
err = ks_ldap_help (ctrl, parsed_uri);
|
|
#endif
|
|
|
|
if (!parsed_uri)
|
|
ks_print_help (ctrl,
|
|
"(Use an URL for engine specific help.)");
|
|
else
|
|
http_release_parsed_uri (parsed_uri);
|
|
return err;
|
|
}
|
|
|
|
|
|
/* Resolve all host names. This is useful for looking at the status
|
|
of configured keyservers. */
|
|
gpg_error_t
|
|
ks_action_resolve (ctrl_t ctrl, uri_item_t keyservers)
|
|
{
|
|
gpg_error_t err = 0;
|
|
int any_server = 0;
|
|
uri_item_t uri;
|
|
|
|
for (uri = keyservers; !err && uri; uri = uri->next)
|
|
{
|
|
if (uri->parsed_uri->is_http)
|
|
{
|
|
any_server = 1;
|
|
err = ks_hkp_resolve (ctrl, uri->parsed_uri);
|
|
if (err)
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!any_server)
|
|
err = gpg_error (GPG_ERR_NO_KEYSERVER);
|
|
return err;
|
|
}
|
|
|
|
|
|
/* Search all configured keyservers for keys matching PATTERNS and
|
|
write the result to the provided output stream. */
|
|
gpg_error_t
|
|
ks_action_search (ctrl_t ctrl, uri_item_t keyservers,
|
|
strlist_t patterns, estream_t outfp)
|
|
{
|
|
gpg_error_t err = 0;
|
|
int any_server = 0;
|
|
int any_results = 0;
|
|
uri_item_t uri;
|
|
estream_t infp;
|
|
|
|
if (!patterns)
|
|
return gpg_error (GPG_ERR_NO_USER_ID);
|
|
|
|
/* FIXME: We only take care of the first pattern. To fully support
|
|
multiple patterns we might either want to run several queries in
|
|
parallel and merge them. We also need to decide what to do with
|
|
errors - it might not be the best idea to ignore an error from
|
|
one server and silently continue with another server. For now we
|
|
stop at the first error, unless the server responds with '404 Not
|
|
Found', in which case we try the next server. */
|
|
for (uri = keyservers; !err && uri; uri = uri->next)
|
|
{
|
|
int is_http = uri->parsed_uri->is_http;
|
|
int is_ldap = 0;
|
|
unsigned int http_status = 0;
|
|
#if USE_LDAP
|
|
is_ldap = (strcmp (uri->parsed_uri->scheme, "ldap") == 0
|
|
|| strcmp (uri->parsed_uri->scheme, "ldaps") == 0
|
|
|| strcmp (uri->parsed_uri->scheme, "ldapi") == 0);
|
|
#endif
|
|
if (is_http || is_ldap)
|
|
{
|
|
any_server = 1;
|
|
#if USE_LDAP
|
|
if (is_ldap)
|
|
err = ks_ldap_search (ctrl, uri->parsed_uri, patterns->d, &infp);
|
|
else
|
|
#endif
|
|
{
|
|
err = ks_hkp_search (ctrl, uri->parsed_uri, patterns->d,
|
|
&infp, &http_status);
|
|
}
|
|
|
|
if (err == gpg_error (GPG_ERR_NO_DATA)
|
|
&& http_status == 404 /* not found */)
|
|
{
|
|
/* No record found. Clear error and try next server. */
|
|
err = 0;
|
|
continue;
|
|
}
|
|
|
|
if (!err)
|
|
{
|
|
err = copy_stream (infp, outfp);
|
|
es_fclose (infp);
|
|
any_results = 1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!any_server)
|
|
err = gpg_error (GPG_ERR_NO_KEYSERVER);
|
|
else if (err == 0 && !any_results)
|
|
err = gpg_error (GPG_ERR_NO_DATA);
|
|
return err;
|
|
}
|
|
|
|
|
|
/* Get the requested keys (matching PATTERNS) using all configured
|
|
keyservers and write the result to the provided output stream. */
|
|
gpg_error_t
|
|
ks_action_get (ctrl_t ctrl, uri_item_t keyservers,
|
|
strlist_t patterns, estream_t outfp)
|
|
{
|
|
gpg_error_t err = 0;
|
|
gpg_error_t first_err = 0;
|
|
int any_server = 0;
|
|
int any_data = 0;
|
|
strlist_t sl;
|
|
uri_item_t uri;
|
|
estream_t infp;
|
|
|
|
if (!patterns)
|
|
return gpg_error (GPG_ERR_NO_USER_ID);
|
|
|
|
/* FIXME: We only take care of the first keyserver. To fully
|
|
support multiple keyservers we need to track the result for each
|
|
pattern and use the next keyserver if one key was not found. The
|
|
keyservers might not all be fully synced thus it is not clear
|
|
whether the first keyserver has the freshest copy of the key.
|
|
Need to think about a better strategy. */
|
|
for (uri = keyservers; !err && uri; uri = uri->next)
|
|
{
|
|
int is_hkp_s = (strcmp (uri->parsed_uri->scheme, "hkp") == 0
|
|
|| strcmp (uri->parsed_uri->scheme, "hkps") == 0);
|
|
int is_http_s = (strcmp (uri->parsed_uri->scheme, "http") == 0
|
|
|| strcmp (uri->parsed_uri->scheme, "https") == 0);
|
|
int is_ldap = 0;
|
|
|
|
#if USE_LDAP
|
|
is_ldap = (strcmp (uri->parsed_uri->scheme, "ldap") == 0
|
|
|| strcmp (uri->parsed_uri->scheme, "ldaps") == 0
|
|
|| strcmp (uri->parsed_uri->scheme, "ldapi") == 0);
|
|
#endif
|
|
|
|
if (is_hkp_s || is_http_s || is_ldap)
|
|
{
|
|
any_server = 1;
|
|
for (sl = patterns; !err && sl; sl = sl->next)
|
|
{
|
|
#if USE_LDAP
|
|
if (is_ldap)
|
|
err = ks_ldap_get (ctrl, uri->parsed_uri, sl->d, &infp);
|
|
else
|
|
#endif
|
|
if (is_hkp_s)
|
|
err = ks_hkp_get (ctrl, uri->parsed_uri, sl->d, &infp);
|
|
else if (is_http_s)
|
|
err = ks_http_fetch (ctrl, uri->parsed_uri->original, &infp);
|
|
else
|
|
BUG ();
|
|
|
|
if (err)
|
|
{
|
|
/* It is possible that a server does not carry a
|
|
key, thus we only save the error and continue
|
|
with the next pattern. FIXME: It is an open
|
|
question how to return such an error condition to
|
|
the caller. */
|
|
first_err = err;
|
|
err = 0;
|
|
}
|
|
else
|
|
{
|
|
err = copy_stream (infp, outfp);
|
|
/* Reading from the keyserver should never fail, thus
|
|
return this error. */
|
|
if (!err)
|
|
any_data = 1;
|
|
es_fclose (infp);
|
|
infp = NULL;
|
|
}
|
|
}
|
|
}
|
|
if (any_data)
|
|
break; /* Stop loop after a keyserver returned something. */
|
|
}
|
|
|
|
if (!any_server)
|
|
err = gpg_error (GPG_ERR_NO_KEYSERVER);
|
|
else if (!err && first_err && !any_data)
|
|
err = first_err;
|
|
return err;
|
|
}
|
|
|
|
|
|
/* Retrieve keys from URL and write the result to the provided output
|
|
* stream OUTFP. If OUTFP is NULL the data is written to the bit
|
|
* bucket. */
|
|
gpg_error_t
|
|
ks_action_fetch (ctrl_t ctrl, const char *url, estream_t outfp)
|
|
{
|
|
gpg_error_t err = 0;
|
|
estream_t infp;
|
|
parsed_uri_t parsed_uri; /* The broken down URI. */
|
|
|
|
if (!url)
|
|
return gpg_error (GPG_ERR_INV_URI);
|
|
|
|
err = http_parse_uri (&parsed_uri, url, 1);
|
|
if (err)
|
|
return err;
|
|
|
|
if (parsed_uri->is_http)
|
|
{
|
|
err = ks_http_fetch (ctrl, url, &infp);
|
|
if (!err)
|
|
{
|
|
err = copy_stream (infp, outfp);
|
|
es_fclose (infp);
|
|
}
|
|
}
|
|
else if (!parsed_uri->opaque)
|
|
{
|
|
err = gpg_error (GPG_ERR_INV_URI);
|
|
}
|
|
else if (!strcmp (parsed_uri->scheme, "finger"))
|
|
{
|
|
err = ks_finger_fetch (ctrl, parsed_uri, &infp);
|
|
if (!err)
|
|
{
|
|
err = copy_stream (infp, outfp);
|
|
es_fclose (infp);
|
|
}
|
|
}
|
|
else if (!strcmp (parsed_uri->scheme, "kdns"))
|
|
{
|
|
err = ks_kdns_fetch (ctrl, parsed_uri, &infp);
|
|
if (!err)
|
|
{
|
|
err = copy_stream (infp, outfp);
|
|
es_fclose (infp);
|
|
}
|
|
}
|
|
else
|
|
err = gpg_error (GPG_ERR_INV_URI);
|
|
|
|
http_release_parsed_uri (parsed_uri);
|
|
return err;
|
|
}
|
|
|
|
|
|
|
|
/* Send an OpenPGP key to all keyservers. The key in {DATA,DATALEN}
|
|
is expected to be in OpenPGP binary transport format. The metadata
|
|
in {INFO,INFOLEN} is in colon-separated format (concretely, it is
|
|
the output of 'for x in keys sigs; do gpg --list-$x --with-colons
|
|
KEYID; done'. This function may modify DATA and INFO. If this is
|
|
a problem, then the caller should create a copy. */
|
|
gpg_error_t
|
|
ks_action_put (ctrl_t ctrl, uri_item_t keyservers,
|
|
void *data, size_t datalen,
|
|
void *info, size_t infolen)
|
|
{
|
|
gpg_error_t err = 0;
|
|
gpg_error_t first_err = 0;
|
|
int any_server = 0;
|
|
uri_item_t uri;
|
|
|
|
(void) info;
|
|
(void) infolen;
|
|
|
|
for (uri = keyservers; !err && uri; uri = uri->next)
|
|
{
|
|
int is_http = uri->parsed_uri->is_http;
|
|
int is_ldap = 0;
|
|
|
|
#if USE_LDAP
|
|
is_ldap = (strcmp (uri->parsed_uri->scheme, "ldap") == 0
|
|
|| strcmp (uri->parsed_uri->scheme, "ldaps") == 0
|
|
|| strcmp (uri->parsed_uri->scheme, "ldapi") == 0);
|
|
#endif
|
|
|
|
if (is_http || is_ldap)
|
|
{
|
|
any_server = 1;
|
|
#if USE_LDAP
|
|
if (is_ldap)
|
|
err = ks_ldap_put (ctrl, uri->parsed_uri, data, datalen,
|
|
info, infolen);
|
|
else
|
|
#endif
|
|
{
|
|
err = ks_hkp_put (ctrl, uri->parsed_uri, data, datalen);
|
|
}
|
|
if (err)
|
|
{
|
|
first_err = err;
|
|
err = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!any_server)
|
|
err = gpg_error (GPG_ERR_NO_KEYSERVER);
|
|
else if (!err && first_err)
|
|
err = first_err;
|
|
return err;
|
|
}
|